A turning drive device is provided that converts power of an engine into electric power and turns a turning body using the converted electric power. The frame can be made of magnetically non-conductive material, having arranged magnetically conductive bar-shaped objects which extend through the rotor frame from the outer surface of the magnetic pole of the rotor to the outer surface of the pole. Thus, even when a large number of information signals are transmitted in a same frequency band, these signals can be separated and demodulated satisfactorily on the receiving side. The detection layer employs one or more detection engines, such as, for example, a rules-based thresholding engine and a profiling engine.